Continuity mistake: Right after the scene where Nels saws up his gun, he walks into a store with his arms folded. His hands are down close to his stomach. When it cuts to the next angle, they are much higher at his chest. (00:26:51)
Continuity mistake: The plate on the vehicle (Silver Mustang - IV6866R), appears in one scene and disappears in the next. (01:21:10)
Continuity mistake: After the kids are told Sara hung herself at the hospital, Chuck asks "what are they waiting for, let's go". Stella is bending down to pick up the book in one shot, but the angle cuts while Chuck is still saying the word "go" and suddenly he has vanished from the room as the other two start to leave.
Continuity mistake: In the first scene at Grandma's house, she wakes Nicole and Henry up early, and tells him to go make mom some coffee. Between shots there are different continuity errors; at first the sheet is rumpled, then the blanket is covering it entirely, then when Grandma leans in and kisses him you can notice Scarlett's right arm first on her chest then behind her back, and Azhy Robertson's chest is uncovered in the second shot when he was still under the blanket up to his neck earlier. (00:15:40)
Continuity mistake: When Lance is telling the guard at the start that he's going to throw his gun to the snowman behind them, the snowman that is there was not there in a previous shot and appeared from nothing.
Factual error: The USA map is inaccurate for the year it is set in. It shows all states but in 1886, many of the northwest states (e.g. Montana, Idaho, the Dakotas) weren't states until 1889+.
Other mistake: The movie is said to be set one year after receiving Annabelle, but the music box from The Conjuring is on the shelf. Judy in The Conjuring is an 8, possibly 9 year old whereas in this film she celebrates her 10th birthday. If Annabelle Comes Home" is only 1 year after obtaining the doll (2 years prior to The Conjuring timeline) then Judy would not be turning 10 years old; she essentially lost a few years of life rather than vice versa.
Character mistake: Toward the end of the film, Detective Davis orders Captain McKenna to put his badge on the table. New York City police always refer to their "shields", not badges.
Revealing mistake: At the start when they're clearing the White House field Little Rock shoots her gun without her finger on the trigger. (00:04:20)
Continuity mistake: After the wolves have killed the guy poorly sniping them at the old encampment location, Clair Hamilton glares at Larsen from her sitting position and moves towards him to ask more about what he just said about Father. During this sequence, Gina Carano's hat is burdened by a bit of snow or practically no snow at all, back and forth with no logic between cuts. (00:35:50)
Continuity mistake: Ben caught his T-shirt in his right hand when the girl threw it to him in the swimming pool, but Ben is with his empty right hand in the pool. When Ben got out of the pool, he picked up his T-shirt. (00:32:18)
Continuity mistake: Dr. Stone mentions there is an emergency exit below the landing pad. He then asks the pilot if there is a camera underneath. In this shot, the pilot has his eyes partly closed and his lips pursed together. It cuts to a close up of him and suddenly his expression is different, with his eyes wider open and his mouth open. (00:19:50)
Factual error: As well as the sergeant's stripes on his cuff, Sergeant O'Neil wears three pips on his epaulettes, which would indicate a much more senior rank and would not be worn together with the stripes.
Other mistake: The ex-husband makes out a check for $108,000 at the start of 2020 when Kate returns from Africa after Christmas, but it is dated 3/18/2019. (01:12:06)
Continuity mistake: En route from the front door of Wayne's mansion to the table in the Batcave, the pile of pizza boxes in Alfred and then in Mike's hands continues to change in size and number: at first the pizza girl delivers 11 boxes, Mike slams on the table just 8, but he brought down the stairs twice that amount (without counting through freeze-frame the precise numbers, it's simply obvious at first glance that the pile is bigger in some shots and the pizzas themselves are pictured of inconsistent size).
Continuity mistake: At the ATM, when Ramona is pulling money out, you can see the reflection of a police car pull up behind her. It pulls up just as she begins to turn around and nobody is getting out in the reflection nor are lights on. But suddenly when she turns around several officers are already standing with guns trained on her and the lights on.
Continuity mistake: Alan and Marie are chatting with the doctor after the initial sonogram. Marie's hands change position few times between shots - for instance right after the "crack" joke, she lowers her hand but it's on top of her pregnant belly at the cut. (00:03:30)
Continuity mistake: Batman enters Lex Luthor's room at night while he's sleeping, and completely casts a shadow over Lex. This wakes Lex up and he sits up. Batman has not moved from his position, but now in the next shots he is no longer casting a shadow on Lex's bed or body. (00:24:47)
Revealing mistake: Mazhar is saved by Raghu who with his amazing strength pulls the chains tied to the tankers and breaks free. The chains supposedly pulled by the powerful trucks though are not in tension. (00:08:50)
Factual error: Eve Curie is shown as having been born before the Curies are nominated for the Nobel Prize in physics, which they eventually won in 1903. However, Even Curie wasn't born until December 6th, 1904.